Os-Nd-Pb-Sr isotopic compositions of the Santaishan ultramafic rock in western Yunnan and its geological significances
文献类型：期刊论文
| 作者 | Chu ZhuYin1; Wang Wei1; Chen FuKun2; Wang XiuLi1; Li XiangHui1; Ji JianQing3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2009-12-01 |
| 卷号 | 25期号:12页码:3221-3228 |
| 关键词 | Tethyan orogenic belt Western Yunnan Ultramafic rock Nd-Os isotopes |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The western Yunnan Tethyan terrain that is formed by the amalgamation of multiple continental blocks represents an important part of the eastern Tethyan tectonic belt. Its tectonic evolution bears essential significances for understanding the formation of the global Tethyan orogenic belt. Along the Longling-Ruili fault zone between the Tengchong and Baoshan blocks, many small outcrops of ultramafic rocks are exposed, which have ever been interpreted as evidence for the suturing of these two blocks. Os-Nd-Pb-Sr isotopic compositions of ultramafic rocks sampled from Santaishan massif were analyzed by using low procedural blank and high precision analytical techniques in this study. Analytical results show that these ultrmafic rocks exhibit isotopic characteristics of strong enrichment. Five analyzed samples of ultramafic rock yield high initial (87)Sr/(86)Sr values (0. 71074 similar to 0. 71444), low initial epsilon(Nd) values ( -6. 2 similar to -10. 6), low initial gamma(Os), values ( -4. 8 similar to -8. 8) and relative high initial Pb isotopic ratios. Os isotopic model ages (t(RD)) range from 0.97 to 1. 71Ga. The Nd-Os isotopic compositions indicate that the Santaishan ultramafic rocks are characterized by the isotopic feature of old sub-continental lithospheric mantle and therefore, can not represent evidence for a suture between the Tengchong and Baoshan blocks. |
| WOS关键词 | UPPER-MANTLE ; VOLCANIC-ROCKS ; NORTH DABIE ; ZIRCON AGE ; TENGCHONG ; CHINA ; GEOCHEMISTRY ; OPHIOLITE ; ANCIENT ; ORIGIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000276369900010 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71784]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chu ZhuYin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 3.Peking Univ, Sch Earth & Space Sci, MOE Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu ZhuYin,Wang Wei,Chen FuKun,et al. Os-Nd-Pb-Sr isotopic compositions of the Santaishan ultramafic rock in western Yunnan and its geological significances[J]. ACTA PETROLOGICA SINICA,2009,25(12):3221-3228. |
| APA | Chu ZhuYin,Wang Wei,Chen FuKun,Wang XiuLi,Li XiangHui,&Ji JianQing.(2009).Os-Nd-Pb-Sr isotopic compositions of the Santaishan ultramafic rock in western Yunnan and its geological significances.ACTA PETROLOGICA SINICA,25(12),3221-3228. |
| MLA | Chu ZhuYin,et al."Os-Nd-Pb-Sr isotopic compositions of the Santaishan ultramafic rock in western Yunnan and its geological significances".ACTA PETROLOGICA SINICA 25.12(2009):3221-3228. |
入库方式： OAI收割
来源：地质与地球物理研究所
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